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4x-9=3(2x-5)
We move all terms to the left:
4x-9-(3(2x-5))=0
We calculate terms in parentheses: -(3(2x-5)), so:We get rid of parentheses
3(2x-5)
We multiply parentheses
6x-15
Back to the equation:
-(6x-15)
4x-6x+15-9=0
We add all the numbers together, and all the variables
-2x+6=0
We move all terms containing x to the left, all other terms to the right
-2x=-6
x=-6/-2
x=+3
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